Matrix for type-founding.



No. 696,733.- Patented Apr. I, |9102.

G. A. GOUDSDN. MATRIX FOB TYPE FOUNDING.

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GEORGE ARTHUR GOODSON, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO y THE GOODSON GRAPI'IOTYPE COMPANY, OF NEW YORK, N. Y., A CORPO- s RATION OF NEIY JERSEY.

.MATRIX FOR TYPE-FOUNDING.

SPECIFICATION forming part of Letters Patent No. 696,733, dated April 1, 1902. Application filed September 3, 1901. Serial No. 74,063. (No model.)

To all whom, t may concern:

Beit known thatl, GEORGE ARTHUR GOOD- SON, a citizen of Canada, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Matrices for Type- Founding; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

My invention has for its object to provide an improved matrix for use in type-founding.

The invention was especially'designed for use in what is known to the trade as the Goodson type casting and setting machine, disclosed in certain United States Patents hitherto issued to me, of which itis suicient forpresent purposes to note my Patent No. 530,481, of date December 4, 1894, and my Patent No. 609,098, of date August 16, 1898. Said last-named patent, No. 609,098, discloses my type casting and setting machine most nearly in its commercial form. In said machine I employ what is designated in said prior patents as an integral-font matrix-block. Otherwise stated, all the matrices are formed on a common plate. The matrices are ar ranged on said block in rows in two directions forpermitting any desired matrix to be centered in casting position by a two-way movement of the matrix-block. Prior to my present invention I employed copper as the metal for the entire face of the matrix-block. This was deposited under the electroplating process on a form of type properly justified in two directions according to the process set forth and claimed in my Patent No. 530,481, of date December 4, 1894. So far as I know copper is the metal affording the best surface against which to cast type-metal with a view of securing the greatest perfection in the cast. Copper is the metal in universal use, so far as I know, for matrices. It is of course well known that copper as compared with some other metals-such as iron, steel, and nickel- I is comparatively soft. Because of itscomparative softness I have found that the wearing or bearing surfaces on the face of a copper matrix-block will in time wear down and become upset to such an extent as not to produce perfect type. In order to insure a perfect joint between the selectedV matrix and the body-mold, the delivery end or wall of the mold-cell proper in the body-mold is raised slightly above the level of the general face of the body-mold, and when the matrix-block and the body-mold are in casting position the two must be tightly clamped together in order to insure the required tight joint between 6o the selected matrix and the cell-wall of the -body-mold. This action in time tends to batter down or upset the bearing-surfaces of the matrix-block. By mypresent invention these defects or limitations are overcome. To this end I provide a matrix-block having its high or bearing surfaces of nickel and its matrices proper or casting-surfaces of copper. I secure these results by a novel process, which can be most readily understood by reference 7o to the accompanying drawings, wherein like notations refer to like parts throughout the several views.

In said drawings, Figure 1 is a viewin sectional elevation, showing a chase or form of type and the rough matrix-block as deposited on the form of type by the electroplating process, the two different metals being deposited in succession and illustrated in the drawings by the dierent shadings. Fig. 2 is a sec- 8o tional view of the rough or unplaned block removed from the chase. Fig. 3 is a sectional view showing the finished or planed block. Fig. 4 is a view showing a portion of the face of the finished matrix-block in plan.

The form of type is set up with the type 1 justified in two different directions, according to the process fully described in my said prior patent, No. 530,481. This form of type isheld in a suitable chase 2 forimmersion in 9o the electroplating-bath. All the surfaces to be immersed and which it is not desired to plate are covered with wax 3. The chase is first immersed in a proper bath for the deposit of copper and is left therein long enough 9 5 for the copper deposited to constitute a thin copper shell 4. Then the chase is taken out from the copper-bath and immersed in a nickel-bath and left therein long enough for the nickel deposited to afford the main or Ico `body portion 5 of the matrix-block. The

matrix-block and the type are then separated, as described in my prior patent or in any suitable way, and the block is ready to be dressed. The rough block (shown in Fig. 2) is planed oit both on its face and on its back to bring the same into the form shown in Fig. 3. By planing off the face ot the block it is obvious that the copper may be entirely cut away from the nickel on the high or bearing surfaces ot the face of the block, thereby leaving the nickel exposed as the bearingsurfaces for the face of the block. At the same time the copper constituting the matrices proper is left undisturbed and remains available for receiving the cast.A Nickel is a very hard metal, and therefore constitutes an admirable bearing-surface for the high or bearing portions of the face of the matrixblock. I have found in practice that a matrX-block constructed as described may be used for an indefinite period of great length "without any perceptible wear or tear on the bearing-surfaces thereof. Hence a single matrix-block will stand up under the service and give perfect type under long-continued use. This I have demonstrated by the actual usage of the nickel-faced matrix-blocks on my cominercial machine.

Vhat I claim, and desire to secure by Letv composed of comparatively soft metal, such as copper, and surrounded by a body of comparatively hard metal, such as nickel, eX-

posed on the face of the matrix-block, so as to' aord the bearing-surfaces on the face of the block, substantially as described.

2. An integral-font matrix-block composed of an integral-font matrix-shell of copper, electrop'lated from a form of type, and a body of nickel, electrodeposited, ou the back of said shell of copper, which block, so formed, has the copper planed off from the high surfaces of its face to expose the nickel as the bearing-surfaces on the face of the block, substantially as described.

3. The process of forming a matrix having its casting-surface ofcopper and its bearingsurface of nickel,\vhich consists in first depositing a shell of copper, under the electroplating process, on a formof type, then depositing a body of nickel, under the electroplating process, on the shell of copper, and inally, planing 0E the copper from the face ot' the matrix-block so as to expose the nickel as the high or bearing surfaces of the matrixblock, substantially as described.

In testimony whereof I aix my signature in presence of two Witnesses.

GEORGE ARTHUR GOODSON.

Vitnesses:

CHAs. E. HUNTER, JAS. F. WILLIAMSON. 

